20554791469 has 4 divisors (see below), whose sum is σ = 20630639680. Its totient is φ = 20478943260.

The previous prime is 20554791461. The next prime is 20554791493. The reversal of 20554791469 is 96419745502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20554791469 - 2³ = 20554791461 is a prime.

It is a super-2 number, since 2×20554791469² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554791461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37923699 + ... + 37924240.

It is an arithmetic number, because the mean of its divisors is an integer number (5157659920).

Almost surely, 2^20554791469 is an apocalyptic number.

It is an amenable number.

20554791469 is a deficient number, since it is larger than the sum of its proper divisors (75848211).

20554791469 is an equidigital number, since it uses as much as digits as its factorization.

20554791469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75848210.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 20554791469 in words is "twenty billion, five hundred fifty-four million, seven hundred ninety-one thousand, four hundred sixty-nine".